Sometimes just the headline of an article is all ya really need understand the situation!
(Note: Why don't they just get Howard Wolowitz from the TV show "The Big Bang Theory: since he has already invented a toilet for the space station!)
Now just for good measure we have included this actual conversation about the subject as recorded by the astronauts during one of their "bio-breaks!"
http://www.livescience.com/57022-pooping-in-spacesuit-is-complicated.html"Get me a napkin quick," said Apollo 10 commander Tom Stafford with some urgency. "There's a turd floating through the air."
"I didn't do it. It ain't one of mine," replied command module pilot John Young.
"I don't think it's one of mine," added lunar module pilot Gene Cernan.
"Mine was a little more sticky than that. Throw that away," said Stafford.
Young then uttered "God Almighty," before the trio broke into laughter.